2013 Bentley Continental GT Speed with Quicksilver Exhausts.

Just installed the new Quicksilver exhausts on my new Speed a day after i collected the car. Sounds good but lost power and torque at low end compares to stock exhausts. Although putting the car on Sports mode does helps a little but overall its not worth losing so much power and torque for this Quicksilver exhausts Therefore i have already installed the stock exhausts back. I did try to disconnect the valves of the stock exhausts so that valves are always open(for louder sound), results were not as free flow(still retain a bit of torque) compared to Quicksilver but nothing makes me happier after i converted it to original stock exhausts. Power returned and drives better,gear shifts faster but of course it does not sound as grumpy as Quicksilver.
I conclude that Quicksilver i installed were too free flow and without a tune to the engine ECU there is no way i am able to use it.

[andy]

Was thinking of disconnecting stock exhaust valves on my 04 GT. So you say it makes it lose torque unless tuned? Good thing I read this. Guess it's a bad idea huh?